Brand guide · Diamant Gear
Diamant Weekend Warrior: 40L vs 50L
The Weekend Warrior is Diamant's carry-on boot backpack: boots in a vented bottom compartment, helmet on top, laptop and clothes in between. It comes in two sizes. Your boot size picks one for you, and your airline's carry-on limit decides whether that bag goes in the cabin without trouble.
Which size to buy
Start with your boot shell. Diamant designs the 40L for boots up to size 28.5 and the 50L for boots up to size 32, plus the snowboard-boot equivalents. A 28.5 shell is roughly a US men's 10.5 (see the ski boot size chart). If your boots are bigger than that, the 40L is off the table.
If both sizes fit your boots, the 40L is the one closer to the common US carry-on limit. It is 2 inches shorter, 1 inch narrower, and 6 oz lighter. Choose the 50L for boots between 29 and 32, or if you pack more layers and accept a bag that is bigger than most airlines' published limits.
Weekend Warrior 40L vs 50L specs
| Spec | 40L | 50L |
|---|---|---|
| Dimensions | 20 × 14.5 × 7.5–9 in | 22 × 15.5 × 8.5–10 in |
| Empty weight | 5 lb (about 2.3 kg) | 5 lb 6 oz (about 2.4 kg) |
| Boot size | Up to 28.5 | Up to 32 |
| Under the seat | Diamant says yes if not packed full, depending on airline and seat | Not claimed, except on CRJ-700 jets |
| Price | $229.99 ($249.99 in Alpenglow Orange) | $249.99 ($259.99 in Alpenglow Orange) |
| Colors | Diamant Black, Twilight Blue, Vermont Green, Aurora Purple, Ice Blue, Alpenglow Orange | Diamant Black, Twilight Blue, Glacier Gray, Vermont Green, Ice Blue, Alpenglow Orange |
Specs, prices, and colors from diamantgear.com, checked November 4, 2026. Boot sizes are as Diamant lists them (mondopoint). Depth is a range because the bag expands as you pack it.
Everything else is the same on both sizes: a 1680D ballistic exterior, a tarpaulin-lined, ventilated boot compartment, a 210D water-resistant interior, a padded goggle pocket, a padded sleeve for up to a 17-inch laptop, zippered side pockets, a hidden pocket with an AirTag sleeve, and a luggage sleeve to slide the bag over a roller handle.
Will it fit your airline's carry-on limit?
Diamant calls both sizes airline carry-on approved with the helmet canopy attached, and says its team has flown them on nearly every kind of aircraft. The exception it names is the CRJ-700 series, where the bag won't fit overhead but does fit under the seat. That is the brand's claim. The airline's published maximum is what a gate agent measures against.
On paper, the 40L is half an inch too wide for the 22 × 14 × 9 in limit most US airlines publish. The 50L matches the 22-inch length, but it is 1.5 inches too wide and up to 1 inch too deep. A soft bag may squeeze into a sizer, but plan to the published number. Diamant offers to check your specific flight and aircraft if you contact them.
| Airline | Carry-on limit | 40L (20 × 14.5 × 9 in) | 50L (22 × 15.5 × 10 in) |
|---|---|---|---|
| American | 22 × 14 × 9 in | 0.5 in too wide | 1.5 in too wide, 1 in too deep |
| Delta | 22 × 14 × 9 in | 0.5 in too wide | 1.5 in too wide, 1 in too deep |
| United | 22 × 14 × 9 in | 0.5 in too wide | 1.5 in too wide, 1 in too deep |
| Southwest | 24 × 16 × 10 in | Within the limit | Within the limit |
| Alaska | 22 × 14 × 9 in | 0.5 in too wide | 1.5 in too wide, 1 in too deep |
| JetBlue | 22 × 14 × 9 in | 0.5 in too wide | 1.5 in too wide, 1 in too deep |
Packed less than full, the 40L sits at 7.5 in deep and the 50L at 8.5 in, so the 50L clears the 9-inch depth limit when it isn't stuffed. Width doesn't change with packing. Airline ski-bag fees and checked-bag rules are in the airline ski bag policy guide.
Flying abroad: the 7 kg weight limit
Some international carriers weigh carry-ons, and 7 kg is a common cap. Diamant says both sizes comply with limits of 7 kg and under, but the empty bag counts. The 40L uses about 2.3 kg of that before you pack anything, leaving roughly 4.7 kg. The 50L leaves roughly 4.6 kg.
Boots, a helmet, and a laptop can use most of that. Weigh the packed bag on a bathroom scale before you leave, and move heavy layers to your body or a checked bag if you are over.
How to pack it
Boots in the bottom compartment
The boot compartment is tarpaulin-lined and vented, so damp liners on the way home stay away from your clothes. Stuff socks and gloves inside the shells to use the dead space. For drying them out between flights, see how to dry ski boots.
Helmet on the canopy
The helmet rides outside on top, with two placement options. Diamant's carry-on claim assumes the helmet is attached there, so measure the bag with the helmet on before you head to the airport.
Laptop and clothes in the main section
Diamant lists room for up to a 17-inch laptop, a tablet, folders, a toiletry kit, a water bottle, chargers, and a few days of t-shirts, underwear, socks, and base layers. Goggles go in the padded goggle pocket, valuables and an AirTag in the hidden pocket behind it.
Jacket and pants on you
Diamant's packing list stops at base layers; it doesn't include a ski jacket or pants. Wear the bulky layers through the airport and keep the bag for boots and the small stuff. The ski trip packing list covers the rest.
Returns and size exchanges
Request a return within 15 days of delivery, and get the unused bag back to Diamant in its original packaging within 30 days of delivery. Diamant pays the US return label, deducts a $5 restocking fee, and doesn't refund original shipping. If your boots don't fit, Diamant exchanges the bag for the other size rather than refunding it, so try your boots in it as soon as it arrives. International returns ship at your cost. Diamant's returns page, checked November 4, 2026.
Shopping from Canada? Diamant sells through a Canadian distributor at diamantgear.ca.